cmd:guf: Added boot bus detection to guf sub-system

The boot bus detection sets an environment variable that contains the USDHC bus, from which U-Boot was started. The variable is used in the search for the boot scripts and prevents U-Boot from mixing um the eMMC and SD-Card.

BCS 746-000814

requested review from @jonas.hoeppner

assigned to @tobias.poganiuch

added 3 commits

• e05705d4 - 1 commit from branch guf_imx_v2020.04-trizeps8plus_2021_12_07
• 39a65009 - cmd:guf: Added boot bus detection to guf sub-system
• c5048ab7 - Removed rearrangement of the USDHC busses

Compare with previous version

enabled an automatic merge when the pipeline for c5048ab7 succeeds

canceled the automatic merge

added 2 commits

• fb5fcbc7 - cmd:guf: Added boot bus detection to guf sub-system
• c432389c - Removed rearrangement of the USDHC busses

Compare with previous version

enabled an automatic merge when the pipeline for c432389c succeeds

Sieht gut aus und bootet.

approved this merge request

merged

Integration merge request: seco-ne/yocto/manifest!859 (merged)

Integration merge request: seco-ne/yocto/manifest!860 (merged)

mentioned in merge request seco-ne/yocto/manifest!859 (merged)

mentioned in merge request seco-ne/yocto/manifest!860 (merged)